package collection;
//集合间的操作

import java.util.ArrayList;
import java.util.Collection;

public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1=new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);//[java,c++,.net]
        Collection c2=new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");//[android,ios,java]

        c1.addAll(c2);
        System.out.println("c1:"+c1);//c1:[java,c++,.net,android,ios,java]
        System.out.println("c2"+c2);//c2:[android,ios,java]

        Collection c3=new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        boolean contains=c1.containsAll(c3);//判断c1中是否包含c3中所有元素
        System.out.println("是否包含："+contains);

        c1.retainAll(c3);
        System.out.println("c1:"+c1);//c1:[c++, android]
        System.out.println("c3"+c3);//c3[c++, android, php]

        //将c1中与c3共有的元素删除，c3不变
        c1.removeAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);


    }
}
